({% for vertex in answer.vertices -%}
  {% if answer.isLabeled -%}{{vertex.label}}{% else -%}{{loop.index}}{% endif -%}
  {% if not loop.last -%},{% endif -%}
{% endfor -%})
[{% for edge in answer.edges -%} 
  ({{edge.src}},{{edge.dst}}){% if not loop.last -%},{% endif -%}
{% endfor -%}]
